4172640525 has 18 divisors (see below), whose sum is σ = 7473663210. Its totient is φ = 2225408160.

The previous prime is 4172640503. The next prime is 4172640569. The reversal of 4172640525 is 5250462714.

It is a happy number.

4172640525 is a `hidden beast` number, since 4 + 1 + 7 + 2 + 640 + 5 + 2 + 5 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 834805449 + 3337835076 = 28893^2 + 57774^2 .

It is not a de Polignac number, because 4172640525 - 2¹⁰ = 4172639501 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 4172640525.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 9272310 + ... + 9272759.

Almost surely, 2^4172640525 is an apocalyptic number.

4172640525 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

4172640525 is a deficient number, since it is larger than the sum of its proper divisors (3301022685).

4172640525 is a wasteful number, since it uses less digits than its factorization.

4172640525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18545085 (or 18545077 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 36.

The square root of 4172640525 is about 64595.9791705335. The cubic root of 4172640525 is about 1609.9176333517.

The spelling of 4172640525 in words is "four billion, one hundred seventy-two million, six hundred forty thousand, five hundred twenty-five".